Chloroacetone → HCID 13794941, compound

Temperature

0 °C

NaOH (1.0M, 40.5 mL, 40.5 mmol) was added at 0° C. to a solution of 4-fluorothiophenol (5.20 g, 40.5 mmol) in methanol (100 mL) followed by addition of chloroacetone (3.87 mL, 48.6 mmol). The reaction was stirred at 0° C. for 5 minutes. Oxone (50 g, 81 mmol) was added all at once. The suspension was stirred at 0° C. and monitored by LC-MS until there was no sulfoxide (reaction intermediate) observed. The reaction was filtered and solid washed with diethyl ether. Most organic solvents were removed from the filtrate. The solution was extracted with diethyl ether three times. Combined organic phases were extracted with 5% NaOH aq. solution three times. Combined aqueous phases were acidified with 1.0N hydrochloric acid to precipitate product. Pure Step A product, 1-(4-fluorophenylsulfonyl)propan-2-one, was obtained after flash chromatography (silica gel, 3:7 ethyl acetate:hexanes) as a white solid. LC-MS found: (M+1)+=217.2.

1. stirringThe suspension was stirred at 0° C.
2. filtrationThe reaction was filtered
3. washsolid washed with diethyl ether
4. customMost organic solvents were removed from the filtrate
5. extractionThe solution was extracted with diethyl ether three times
6. extractionCombined organic phases were extracted with 5% NaOH aq. solution three times
7. customto precipitate product

ORD record

ord-54aafaa45c154292b6ad0b7c1774e8c1

Source dataset

uspto-grants-2009_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07507730B2